[dm-crypt] Cryptsetup-reencrypt and data integrity.

Arno Wagner arno at wagner.name
Wed Mar 8 22:30:22 CET 2017

Hi Daniel,

as you need to do a backup anyways for this to be safe, it is 
very easy to just verify the backup against the volume after
re-encryption one additional time. 

If you do this without backup, your data is obviously 
non-critical and so errors do not matter....


On Wed, Mar 08, 2017 at 20:55:24 CET, daniel at borek.me.uk wrote:
>    I was playing with cryptsetup-reencrypt recently and I noticed it
>    doesn't do any integrity checks on re-encrypted data and there is an
>    assumption everything went fine once the command completes. Are there
>    any plans to introduce integrity checks in the future? I understanding
>    that verifying large volumes of data would be a time consuming task but
>    lack of such option may be a show stopper for some setups.
>    -Daniel-

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Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno at wagner.name
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